it's not just president obama. research shows that stress does not affect when or how fast your hair turns gray. what does? it's my must-read and up on our facebook page at facebook.com/jansingco. ll come . delicious and wholesome. some combinations were just meant to be. tomato soup from campbell's. it's amazing what soup can do. >>> the presidential candidates are prepping for tomorrow's big debate. joe biden in north carolina and paul ryan on a bus tour in iowa. last night he was in dubuque. the first time at a public campaign event he delivered this line. >> the choice is clear, and here is what we are doing. we are entering the debate phase, the choice phase of this campaign. this choice is ever so clear. >> speaking of choice, has mitt romney's choice of paul ryan paid off? let's ask republican strategist and former gingrich campaign senior advisor david winston and nbc latino contributor, a senior fellow at the university of texas. good morning to both of you. will mitt romney have to and be able to defend p